Rolling mill



Jul 5,19 2. g H L 1,865,941-

ROLLING MILL Filed May 9, 1929 2 Sheets-Sheet 2 IN VEN R' rrys.

Patented daily 5, i932 stares PATENT @FFlfiE iREN'E MICHEL, OF ABGENTE'UTL, FRANCE ROLLING MILL Application filed May 9, 19%, Serial No.

trains of rolls mill vary even if the said trains operate at exactly constant speeds. l

loose part or loop between the two trains of rolls is stretched by the action of a constant force, and; this process. assures the proper operationof the rolling mill and a 15 constant thickness of the rolled striip.

To carry the saidprocess into e ect, it is possible to employ between the twotrains of rolls, a roller which bears upon the stri b the action of a suitably applied force w ic may be produced by a wei ht subject to gravity and having an adjusta le position upon a lever which is connected to the said roller by rod-and-link gear. a

The movements of said roller preferably control the speed of the two trains of rolls,

or of only one, thus reducing the length of the loose part or loop when the said roller descends, or inversely. It is also feasible to control: by the displacements of the said to roller, the parts by which the rolls are variably spaced apart, so as to compensatethe elongation and the shortening of the said loop. i Q

To prevent the said .roller ,.from falling F when at the-end of the strip, the apparatus may comprise a supporting roller carrying the strip, which presses upon this roller, and

a mechanism so arranged that when this pressure ceases, the roller will be held in the 13 position which it occupies.

The device may comprise a drum carrying a cable which is attached to the said roller. A counterweight serves to stretch the cable,

and a brake is mounted on the roller, so that 3 when the strip reaches the end it will no longer press upon the said supporting roller, and thus a suitable mechanism will actuate the brake, to prevent the said roller from fallmg.

In the accompanying drawings WlllCh 1s According to the present invention, the;

. strip travels, and the strip is main horizontal.

861,788, and in Germany May 19, 1828. given by way of example to facilitate the description:

Figure 1 is a diagrammatic .view of an apparatus according to the invention.

Figure 2 is a corres onding end view, showing the trains of ro ls.

Figure 3 is the corresponding plan view. Figure 4 is a partial view showin the brake for the cable drum and its contro The form of construction herein re resented relates to the case of two trains 0 rolls .1,

2 mounted in series, each train. having two rolls 3, 4 and 5, 6 respectively. The stri to be rolled is fed in at 7 (Figure 2) it travel between the rolls 3, 4 and then between the rolls 5, 6, and issues at 8. Between the trains 1 and 2 isdisposed a roller 9 upon which the a so supported by the rollers 10, 11. The roller 9 is mounted in a forked bracket secured to the end of a lever 13, pivoted at 14-, and the said bracket is so disposed that the roller 9 will always re- This roller is slidable on its axle but is not movable in the direction of travel of the strip.

The said lever 13 is connected, by rods. 15

to an arm 16 (Fi 2) rotatable on a fixed axle situated at 1 The counterweight -18 mounted on said arm 16 tends to draw down the roller 9 by means of the rods 15, and said.

weight is slidable on the. arm 16 by. the action of a handle 19 and the chains 20, 21, 22. The pointer 23 shows this motion, and it thus indicates the effort exercised upon the roller 9..

The saidroller 9 controls a servo-motor 24' by means of a lever 13 'androd 25, and said motor actuates' a pivoted arm 26, which changes the ratioof the driving ear. and hence the speed of thegt'rain of rol s 1, that is, thetrain into whichfthe said strip 7 enters; in fact, the powerfis transmitted from,

the drivingpinion27l (Figure'3) to the'roll Y of the 'first 'trainby'me'ans of the ear wheel 29, the pair of pulleys (connecte by a belt 28) and the gear wheels 32, 33, said pulleys are so constructed that "their driving ratio can be variedbyitheaction of said arm 26." It is thus observed that due to the adjustment of the position of, the weight 1:8by the handle 19, the stripiijs pressed down at'the 9 proper tension which is required for an approved rolling of the strip whereby a uniform thickness will be obtained. When the roller .9 descends, it actuates-by the servomotorthe apparatus which reduces the speed of the train 1.v The loose part or loop of the band 7 is thus shortened, and the roller 9 resumes its position. The operation is performed in the inverse direction when the roller 9 rises, and the speed of the train 1 is thus increased.

In this manner, all disturbances are automatically compensated, and the operator is only required to look after the output train of rolls in order to assure the regularity of the strip. If as occurs in practice he should be obliged to modify the ressure between the output rolls, these mo ifications are automatically performed at the input rolls.

Obviously, more than two trains of rolls can be mounted in series, with a stretching roller disposed between each train.

In the case of three trains in series, the middle train of rolls is preferably operated at constant speed, and the speed of the other two is regulated bythe adjacent regulating rollers.

It is preferable that the same adjustment be preserved for all the strips of the same lot, or else when a strip has travelled through, the roller 9 will tend to descend. This defect is obviated in the following manner.

The lever 13 is suspended from the belt 34 which is wound upon the drum 35. To the said drum is secured at one end a brake drum 36 (Figures 2 to 4) and at the other end a pulley 37 controlled by the counterweight 38.

Whenissuing from the rolls 1, the rolled strip 7 travels over a supporting roller 10 whose axle is movable in slots 39 (Fig. 4). The said roller is suspended from the lever 40 of the band brake 36. During the rolling process, the pressure of the strip 7 on the roller 10 will bring it upon its supports of rotation, and the brake 36 is out of action, so that the drum will follow all motion of the lever 13 due to the action of the said weight 38, whereby the belt 34 will be constantly stretched.

When the rear end of the strip 7 leaves the train 1 the pressure ceases upon the'roller 10, so that the weight 41 will raise it while turning the lever on its axle 42, thus applyin the brake 36, and thus the lever13 and ro ler 9 are at once held fast at a level hardly below their operating position.

To take in the next stri the operator seizes it when issuing from t e train of rolls 1; he then passes it under the roller 9 and inserts it into the rolls 2. Since the roller 9 is somewhat lowered, the strip tends-to lower the roller 10, and it thus releases the drum 35 and also the lever 13.

If for an reason the is not properly stretched, e operator presses upon the handle 43 at the end of the brake lever 42, thus lowering the roller 9 gradually into contact with the strip. When the adjustment is to be changed, he operates the drum 35 by the crank 44, also relieving the brake 36 by means of the said handle 43.

Havin now particularly described and ascertaine the nature of my invention and in what manner the same is to be performed, I declare that what I claim is:

1. A rolling mill comprising two trains of rollers, a roller between said two trains of rollers adapted to rest u on the material treated, a lever connected y linkage to said roller, a counter-weight movably mounted upon said lever and means for displacing said counter-weight.

2. A rolling mill according to claim 1 comprising said roller resting upon said treated strip, an auxiliary roller upon which the treated material presses and means for maintainin said roller in place, said means being contro led by said auxiliary roller.

3. A rolling mill according to claim 1 comprisin said roller adapted to rest upon the material treated between the sets of rolls, an auxiliary roller placed under the material treated, a device I holding said first named roller, a brake in the said device and means controlled by said auxiliary roller to control the brake.

4. A rolling mill according to claim 1 comprisin said roller adapted to rest upon the material treated between the sets of rolls, an auxiliary roller placed under the material treated a drum carrying a cable connected to-said first mentioned roller, a brake on the said drum, and means controlled by said auxiliary roller to control the brake.

5. LA. rolling mill according to claim 1 comprising said roller adapted to rest upon the material treated between the sets of rolls, an

auxiliary roller placed under the material treated, a drum carr in a cable connected to said first mentione ro ler, a brake on the said drum, a weight tending to turn the drum, and means controlled by said auxiliary roller to control the brake.

In testimony whereof I have signed this specification.

RENE MICHEL. 

